US2692969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual secondary signal transformer
Assignee: Askania Regulator Co
•
Filing: 1950-05-11
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Granted: 1954-10-26
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Expires: 1970-05-11
Abstract
No abstract record available.
Inventors
- 👤 John A Baring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; H; H01; H01F; H01F29/00; H01F29/08; H01F29/10; H01F29/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2053077A
Cited
US2322498A
Cited
US2358725A
Cited
US2439891A
Cited
US2483090A
Cited
US2455672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |